Apparatus for forming couplings for pipe-sections



(No Model.) 2 sheet-s sheet 1.

H.E.BOYD. 4 APPARATUS FOR FORMING COUPLINGS FOR PIPE SECTIONS.

Patented Aug. 4, 1896.

(No Model.)

2 Sheets-Sheet. 2. H. E. BOYD.

APPARATUS FOR FORMING COUPLINGS FOR PIPE SEGTIONS.

. Patented Aug. 4,1896. 5%

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UNITED I STATES PATENT OFFICE.

I'IENRY E. BOYD, OF MCKEESPORT, PENNSYLVANIA.

APPARATUS FOR FORMING COUPLINGS FOR PIPE-SECTIONS.

SPECIFICATION forming part of Letters Patent No. 565,257, dated. August 4, 1896. Application filed August 24, 1895. Serial No. 560,389. (No model.)

To all whmn it may concern.-

Be it known that I, HENRY E. BOYD, a resident of McKeesport, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Apparatus for Forming Couplings for Pipe- Sections; and I do hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to apparatus for forming couplings for pipe-sections, its object being to provide a means for forming tapering threads within said coupling without the necessity of tapping the tapering threads in the ordinary difficult and expensive manner, or, in case it is not desired to taper the coupling, to provide a means for giving a certain standard size to the coupling when straight at both nds.

My invention comprises certain improvements and combination of parts, all of which will be fully hereinafter set forth and claimed.

To enable others skilled in the art to make and use my invention, I will describe the same more fully, referring to the accompanying drawings, in which Figure 1 is a plan view of my improved apparatus. Fig. 2 is a'bottom view of a portion of the same. Fig. 3 is a cross-section on line 3 3, Fig. 1, showing the apparatus in its normal position. Fig. & is a like view showing the position of the apparatus when compressing the coupling. Fig. 5 is a like View showing the apparatus ready to deliver the coupling therefrom. Fig. 6 is a view of the coupling with the plugs inserted therein before the compressing operation, and Fig. 7 is a view of the coupling after it has been compressed.

Like letters indicate like parts in each of the figures.

I will first describe the apparatus preferably employed in carrying out the method and then describe the method as practiced therein. The cast-iron ring a is supported upon a suitable frame, said ring having the annular groove a formed therein, within which the radial socket-pieces b fit. These radial socket-pieces b have formed therein the circular grooves 11, said grooves being adapted to receive the correspondinglyshaped outer ends 0 of the levers c. The inner ends 0 of said levers c are also circular in form and fit within correspondingly-shaped seats (1 in the segmental blocks d, which together comprise what I term the compressing-ring D. This compressing-ring D is com posed of a number of such segmental blocks d, according to the size of the coupling which said compressor isto receive. These segmental blocks 61 are held between the upper annulus e and the lower annulus e by means of bolts e a passing through slots in said upper annulus and lower annulus and tapped into said segmental blocks d, whereby said seg mental blocks are freeto move to and from the center of said ring D. The heads of the bolts 6 fit into countersunk seats in the upper annulus e.

Secured to the cast-iron ring a are the bars f, in which are hung the rods g, the lower ends of saidrods carrying washers or heads g. These rods g pass through the slots h in the levers c. Springs 2' are interposed between the washers g and the levers 0, whereby said levers are normally held at the position shown in Fig. 3. The upper ends of the rods 9 are screw-threaded to receive the nuts 9 Secured to the bottom face of several of the levers c are the bent levers 7t". Pivoted to the lower end of each bent lever 10 by means of the strap 6 is the support m, these supports being arranged at suitable intervals around the inner periphery of the ring D, and being adapted to support the coupling when placed in position to be compressed.- Accordingly said supports m project, normally, slightly beyond the inner faces of the segmental blocks 01.

The segmental blocks cl have their inner faces constructed to conform to the shape to be given to the coupling, that shown in the drawings being slightly convex, as at n, th ou gh it is to be understood that the faces of the segmental blocks may be of any shape, according to the form of the outer face of the coupling after it is compressed. For example, the faces of the blocks may be straight and the couplings before they are compressed may be slightly bulged in the center, so that when compressed their outer faces will be straight. I have also shown the apparatus as applied to forming a taper at both ends of the coupling, though it may be tapered only at one end.

The method of compressing the coupling is practiced with said apparatus in the following way: A coupling 0 is tapped with the straight threads 0' and has inserted therein the tapering plugs 10 with the threads 19" formed thereon. The coupling 0, with the plugs inserted in the manner described, is: placed within the ring D on the lower end of ferentially the coupling contained within said ring and imparting to said coupling the shape j of the inner faces of said segmental blocks. As these inner faces are convex in form in the drawings illustrating the invention, a taj per will be imparted to both ends of the coupling, the plugs 19 supporting the interior of the coupling during the compressingoperation, and the interior of the coupling being in this way formed with tapering inner walls and the screw-threaded surfaces thereof having the same taper imparted to them. These screw-threads are supported and held in proper relative position by the threaded surfaces of the plugs into which the threads on the interior of the-coupling are forced, so that after compression the threads are in perfect alinement. Upon the further depression of the ring D the levers c are brought to the position shown in Fig. 5, whereupon the segmental blocks d, together with the supports m, are withdrawn sufficiently to allow the coupling to drop from the ring.

1 force the levers 0 back to their normal posltion, as shown in Fig. 3, when the ring D is prepared to receive another coupling to be compressed in the manner described.

faces of the segmental blocks (1 or of the outer or inner walls of the coupling to be com-p pressed, so that only one end of the coupling need be tapered, the ends of the coupling may be compressed to form inwardly-flaring inner walls, or the apparatus may be used where both ends of the coupling are to be straight, as by subjecting the couplings to;

this compression a certain standard size can supporting-plugs therein.

What I claim as my invention, and desire to secure by Letters Patent, is-- form a compressing-ring, reciprocating sup- Any suitable press or Upon the elevation of the press or plunger the springs ports extending inwardly beyond said blocks and mechanism for moving said blocks toward and from the center of the circle, substantially as set forth.

2.- The combination of a series of movable segmental blocks arranged in a circle so as to form a compressing-ring, supports extending inwardly beyond said blocks and mechanism for moving said blocks toward and from the center of the circle, and for withdrawing said supports, substantially as set forth.

3. The combination with a suitable frame, ofa series of depressible segmental blocks arranged in a circle therein and supported from their sides within said frame, said blocks having a combined longitudinal, and inward and outward movement, and mechanism for moving said segmental blocks, substantially as set forth.

4. The combination with a suitable frame, of a series of depressible segmental blocks arranged in a circle within and supported from their sides within said frame, said blocks having a combined longitudinal and inward and outward movement, and a pusher acting upon the ends of said blocks to impart such movement thereto, substantially asset forth.

5. The combination with a suitable frame, of a series of depressiblesegmental blocks ar ranged in a circle therein, levers mounted in the frameand the blocks, and a pusher acting upon the ends of the blocks to cause them to move with a combined longitudinal and inward and outward movement, substantially as set forth.

6. The combination of a suitable frame, of a series of segmental blocks supported therefrom, rings at the ends of said blocks, said blocks having a combined longitudinal and inward and outward movement, and a pusher contacting with one of said rings, and adapted to lower said segmentalblocks, substantially as set forth.

7. The combination of a seriesof segmental blocks arranged in a circle and having a combined longitudinal and inward and outward I 3 movement, and a support adapted to extend It is obvious that the form of the coupling may vary by changing the shape of the inner inwardly beyond the blocks andhaving alongitudinal movement with and an outward movement from the space within the blocks, substantially as set forth.

8. The combination with a suitable frame, of a series of segmental blocks, levers extending between the frame and blocks, and springs acting upon said levers to hold the same and the blocks in a raised position, substantially as set forth.

9. The combination with a suitable frame, of a series of segmental blocks arranged in a circle therein, levers extending between the frame and blocks, of bars secured to the frame, and rods connected thereto and carrying springs, acting upon the under surface of the levers, substantially asset forth. 1. The combination of a series of movable segmental blocks arranged in a circle so as to 10. The combination with a supportingframe, of a series of segmental blocks arranged in a circle, levers extendingbetween the frame of a series of segmental blocks arranged in a circle therein, levers connecting said frame I 5 and said blocks, said levers having rounded ends adapted to engage with seats in said frame and blocks, and mechanism for lowering said blocks, substantially as set forth.

In testimony whereof I, the said HENRY E. 20 BOYD, have hereunto set my hand.

HENRY E. BOYD.

Vitnesses:

RoBT. D. TOTTEN, GRACE O. RAYMOND. 

